package tcp;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class TcpEchoServer {
    public ServerSocket socket=null;
    public TcpEchoServer(int port) throws IOException {
        socket=new ServerSocket(port);
    }

    public void start() throws IOException {
        ExecutorService pool= Executors.newFixedThreadPool(10);
        while (true){
            Socket clientSocket = socket.accept();

            pool.submit(new Runnable() {
                @Override
                public void run() {
                    processConnetion(clientSocket);
                }
            });
        }

    }

    private void processConnetion(Socket clientSocket) {
        try (InputStream inputStream=clientSocket.getInputStream();
             OutputStream outputStream=clientSocket.getOutputStream()){
            Scanner scanner=new Scanner(inputStream);
            while (true){
                if (!scanner.hasNext()){
                    break;
                }
                String request=scanner.next();
                String response=process(request);
                PrintWriter printWriter=new PrintWriter(outputStream);
                printWriter.println(response);
                printWriter.flush();

            }

        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    private String process(String request) {
        return request;
    }

    public static void main(String[] args) throws IOException {
        TcpEchoServer server=new TcpEchoServer(9090);
        server.start();
    }
}
